The buyer has first to select the category of products or services which are of interest for him.

Then, when the selected web page is open, he has to consult the corresponding catalogue.

In the catalogue he could have a preview of all the products, services and their relative prices.
To acquire one of them, he has to click on the corresponding icon of the shopping cart (Reserve).

Clicking on the button view he could verify on each instant his own choices of buying. The contents of the shopping cart display: loaded products or services and general price.

It's possible to delete, modify or confirm the shoppings before effecting the payment.